hello i checked everything in the back pretty much from the exhaust to spare tire holder and i can not firgure out what is rattling in the cargo area it only ever starts to do it when i brake at a red light or stop sign. It doesnt do it when in park or driving. Its driving me crazy! lol. Has anyone else had this or know anyhting what it could be? I have one mroe question its not pertaining to this though. Qlogic makes a subwoofer box that fits in that little hole in the back for a Grand Cherokee, does anyone know if it fits the XJ Cherokee? Thanks for the Help!